\begin{tabular}{l*{3}{c}}
\toprule
            &\multicolumn{1}{c}{\shortstack{Orient nb. other\\ cand., t+1}}&\multicolumn{1}{c}{\shortstack{Orient nb. other\\party cand., t+1}}&\multicolumn{1}{c}{\shortstack{Orient. nb. other\\indep. cand., t+1}}\\\cmidrule(lr){2-2}\cmidrule(lr){3-3}\cmidrule(lr){4-4}
            &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}\\
\midrule
RD\_Estimate &      -0.426&      -0.370&      -0.056\\
            &     (0.066)&     (0.056)&     (0.040)\\
\midrule
Robust p-value&       0.000&       0.000&       0.645\\
Observations&        6575&        6575&        6575\\
Polynomial order&           1&           1&           1\\
Bandwidth   &       0.050&       0.050&       0.050\\
Mean, left of threshold&       1.854&       1.404&       0.450\\
Wald test (2)-(3)&            &       Chi2 &Robust p-value\\
            &            &            &            \\
\bottomrule
\end{tabular}
